Carburetor throttle



Oct. 18, 1932.

F. W. SCHAFFNER CARBURETOR THROTTLE Filed March 2, 1952 mun 1i lllllllldeflecting means.

Patented Oct. 18, 1932 PATENT OFFICE FREDERICK W. SCHAEENEB, OF BROOKLYN, NEW YORK CARBUR-EIOR THROTTLE Application filed March 2,

This invention relates to carburetors of the character set forth in myco-pending application filed September 3, 1931, Serial Nor 561,068, andmore particularly to means for controlling the fuel from the carburetorto the engine and has for the rimary object, the provision of a deviceof t e above stated character which will provide an efficient andpractical control over the fuel at all speeds of the engine and which isso constructed that the fuel passing through the same Wlll be deflectedinto several paths. extending angularly to each other and thereby causea more thorough mixing and breaking up of the fuel providing acombustible mixture capable of providing greater power and lesscarbonization of the engine.

Another object of this invention is the provision of deflecting elementscooperating with the control means, whereby the fuel passing through andfrom the carburetor will be given a swirling action and travel insubstantially spiral paths.

With these and other objects in view, th s invention consists in certainnovel features of construction, combination and arrangement of parts tobe hereinafter more fully described and claimed. 1

For a complete understanding of my 1nvention, reference is to be had tothe following description and accompanying drawing, in which Figure 1 isa side elevation partly in section illustrating a combined fuel controland Figure 2 is a fragmentary sectional view taken on the line 2-2 ofFigure 1.

Figure 3 is a perspective view illustrating a fuel deflecting elementoperating in conjunction with the control means forcausing 'the fuel totravel in spiral paths when leav-- ing the carburetor.

Figure 4 is a rspective view illustrating the sections of th e controlmeans.

Referring in detail to the drawing, the numeral 1 indicates a carburetorhaving a mixing chamber 2 supplied with fuel from a chamber 3 and airfrom main and auxiliary air intakes 4 and 5, respectively. The upper endof the mixing chamber 2 is flanged and 1932. Serial No. 596,354.

apertured to receive fasteners for attaching the carburetor to theintake manifold of an engine. The air and fuel passing upwardly throughthe mixing chamber 2 under the suction of the engine is controlled by avalve 6 consisting of a pair of rotatablymounted shafts 7 each carryinga. semi-circular shaped plate. The shafts 7 are connected by gears 9 andone of said shafts is provided with an operating medium 10 for impartingrotation to said shafts. Due to the gears 9, the shafts when actuatedrotate in opposite directions causing the plates 8'to either open orclose the mixing chamber to the engine. The plates 8 when in passageclosing position are adapted to abut and the abutting edge of one plateis concaved while the companion edge of the other plate is convexedcausing said plates to interfit when in passage closingposition. Theabutting edges of the )lates are notched as shown at 11 and when 1npassage closing position, the notches align permitting a slight amountof fuel to pass to the engine for the pur ose of maintaining the enginerunning at i ling speed. As the plates 8 are moved by the operation ofthe shafts they move apart assuming oppositely inclined positions asshown in Figure 1, and the passing of the fuel by the plates causes saidfuel to be deflected at several angles thereby causing a more thoroughmixing ofthe fuel prior to entering the engine. The fuel passingupwardly between the plates as shown in Figure 1 strikes the under facesof said plates and is deflected in paths extending angularly t0 eachother with the fuel of one path crossing the fuel of the other path. Thefuel also extends upwardly by the plates about the outer edges andmingles with the deflected fuel pasmg up between the plates. Arcuatelycurved ribs 90 12 are formed on the under faces of the plates 8 and thefuel passing upwardly between the plates is given a swirling actionbesides being deflected laterally by the plates themsftlallves therebymore thoroughly mixing the A tubular sleeve 13 is seated in the upperportion of the mixing chamber 2 above the control valve 6 and has formedupon its inner face a plurality of arcuately curved ribs 14 sothat thefuel contacting with said ribs will be given a swirlin action therebycausing the fuel when leaving the carburetor to the intake manifold ofthe engine to travel in substantially spiral paths.

The valve lates when opened or positioned as shown in i re 1 permit thepassage of fuel through t e throat of the carburetor.

The fuel passing between the plates in Figure 1 is deflected in a larstreams and each stream given a swirlmg action by the ribs 12. Thesestreams pass upwardly and laterally toward the walls of the throat. Thefuel also passes the plate between themselves and the walls of thethroat and the last named fuel is given a swirling action by the ribs 14on the tubular sleeve 13, consequently the various streams of fuel willthoroughly mix before enterin the engine to which the carburetor isattac ed. 7

The foregoing description relates to a construction which moreefliciently mixes or breaks up the fuel leaving the carburetor and priorto entering the engine and thereby obviating any possibility of the fuelentering the engine in a raw state or containin lobules of anyappreciable size. The fue oing interru ted or deflected into severalpaths besides eing given a swirling motion will enter the engine in ahighly vaporized condition capablecof producing maximum power with aminimum consumption of fuel and carbonization of the'en e.

While I have shown and escribed the preferred embodiment of myinvention, it will be understood that minor changes in construction,combination and arrangement of parts may be made without departing fromthe spirit and scope of my invention, as claimed.

Having thus descri ed my invention, what I claim is:

1. A carburetor throttle comprising semicircular valve plates mountedfor pivotal movement in opposite directions within the throat ofa'carburetor for controlling the passage of fuel through the throat, oneof said, plates having its straight edge concave and the other'platehaving its straight edge convex, said concave and convex edges adaptedto fit one within the other durin the positioning of the plates to closethe t roat and each of said edges having notches to align for formingports of a given size to permit passage of a regulated amount of .fuelby said plates when in throat closing position proper or running anengine at idling speed, fuel deflecting means on said plates to swirlthe fuel passing between said plates when the latter are positioned toopen the throat, and means located above the plates within the throat toswirl the fuel passing between the plates and the walls of the throat.

2-. A carburetor throttle comprising semicircular shaped valve platesmounted for pivotal movement in opposite directions within the throat ofa carburetor, means permitting some flow of fuel when the plates are inthroat closing position, said plates adapted when moved away from eachother to permit fuel to pass therebetween and be deflected in streamsangularly to each other and to pass between the walls of the throat andthe plates, spaced curved ribs on the inner faces of the plates and thecurvature of the ribs of one plate being'arranged opposite to thecurvature of the ribs of the other late whereby the fuel deflected bythe inner aces of the plates will be given swirling movements in oposite directions to each other, and curved ri s on the walls of thethroat above the plates to give the fuel passin between the walls of thethroat and the p ates a swirling movement.

In testimon whereof I aflix my signature.

FRED RICK W. SCHAFFNER.

